ASHRAE Terminology

A Comprehensive Glossary of Terms for the Built Environment
ashrae.org/ashraeterms

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IEQ

indoor environment quality

indoor air quality (IAQ)

attributes of the respirable air inside a building (indoor climate), including gaseous composition, humidity, temperature, and contaminants. See also indoor environment quality (IEQ). See also sick building syndrome.

indoor environment quality (IEQ)

a perceived indoor experience of the building indoor environment that includes aspects of design, analysis, and operation of energy efficient, healthy, and comfortable buildings. Fields of specialization include architecture, HVAC design, thermal comfort, indoor air quality (IAQ), lighting, acoustics, and control systems. See indoor air quality (IAQ).